scioptic ball
English
Noun
scioptic ball (plural scioptic balls)
- The lens of a camera obscura mounted in a ball that fits a socket in a window shutter so as to be easily turned, like the eye, to different parts of the landscape.
Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for scioptic ball under scioptic in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913)